Apparatus for cleaning the wire webs in paper-making machines.



No. 658.289. Patented Sept. 18,1900

J. M. SHEPHERD. APPARATUS FOR CLEANI HE WIRE WEBSHN PAPER MAKINGMAGHINES olic (No Model.)

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UNITED STATES PATENT OFFICE.

JOHN M. SHEPHERD, OF MOTTVILLE, NEW YORK;

APPARATUS FOR CLEANING THE WIRE WEBS IN PAPER-MAKING MACHINES.

SPECIFICATION forming part of Letters Patent No. 658,289, datedSeptember 18, 1900.

Application filed December 21, 1899. Serial No. 741.171. (No model.)

To all whom, it may concern:

Be it known that I, JOHN M. SHEPHERD, a citizen of the United States,residing at Mottville, in the county of Onondaga and State of New York,have invented new and useful Improvements in Apparatus for Cleaning theWire Webs in Paper-Making Machines, of which the following is aspecification.

My invention relates to means for cleaning wire-cloth webs ofpaper-making machines of the Fourdrinier type; and the objects of thesame are to provide means whereby the wire web may be uniformly andexpeditiously cleaned during the operation of the machine and to extendthe life of the felt jackets used on coucher-rolls by preventing thecleaning acids from coming in direct contact therewith and also toprovide for the saving of the material used in cleaning the wire web.

The felt jackets used for covering the coucher-rolls for paper-makingmachines as at present constructed are quite expensive and requirefrequent renewals, owing to the fact that a destructive acid isgenerally applied to the felt jacket for cleaning the wire It is the 3web upon which the paper is made. purpose of my invention to providemeans for cleaning the wire web by acid, but to dilute the acid beforeit is conveyed to the couoher-roll or immediately thereafter.

I attain the objects and advantages referred to by means of themechanism illustrated in 5 the accompanying drawings, which form aj partof this specification, and in which- Figure l is a sectional view of aportion of a paper-making machine showing my invention connectedthereto. Fig. 2 is a transverse sectional view of thesame.

Like figures of reference designate like parts wherever they occur inboth views of the drawings.

The felt-covered coucher-roll is designated by the numeral 1 and thewire-cloth web is numbered 2.

Suitably attached to the frame of the machine and located immediatelyunder the wire web is a supporting roller 3, and 4 is a trough which ismade of some acid-proof material and is of a form to extend nearly ifnot quite to the longitudinal axial line of said roller, and, as shown,the roller sets well down withinthe trough in order that acomparatively-small quantity of the cleaning material will serve toperform the operation of cleaning. At one end of the trough a waste-pipe5 and a stop-cock 6 are attached for the purpose of letting out the acidafter the cleaning operation. This roller absorbs or laps up a quantityof acid and applies it to the wire-netting to remove small particles ofadhering pulp, &c

A thin hard-rubber wiper or cover 7 may be applied to the central partof the roller, between said roller and trough, to prevent acid fromcoming in contact with the roller and being applied to the wire web atplaces where it is not desired to clean it.

With a view to the destruction of the deleterious effect of the smallquantity of acid which may reach the couch-roll I provide a water-pipe8, located just above the couchroll, said pipe having a number ofperforations through which the water is forced as a spray to cleanse thefelt jacket during the time the wire web is being treated.

It will be obvious from the foregoing that upon the couch-roll reducesthe strength of I the small quantity of acid which may be conveyed tothe felt-jacket until-the deleterious efiect is entirely destroyed. Itwill be understood that during the time the acid is being applied to theapron the operation of feeding pulp to the apron will be suspended. The

couch-roll is in contact with the wire apron during the cleaningoperation, but owing-to the water-spray the acid is diluted sufficientlyat this point to overcome its deleterious effect. Having thus fullydescribed my invention, what I claim is.

In a papermaking machine, an endless wire apron supported upon rollers,a trough located immediately below one of said rollers for containingacid for application to said Wire apron by the roller, a wiper or coverapplied to the central portion of said roller, a

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felt-covered couch-roll, contacting with said my hand in presence of twosubscribing Witapron, and a Water-spray pipe for casting nesses.

Water upon said felt-covered couch-r011 to dilute the acid conveyedthereto by the end- JOHN SHEPHERD 5 less apron, and means to cause theapron to Witnesses:

travel, substantially as described. WM. J. MCLAUGHLIN,

In testimony whereof I have hereunto set- L. G. DOVE.

